diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac893c2ec..30938f4e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -39,6 +39,7 @@
 - Minor: Migrate /delete command to Helix API. (#3999)
 - Minor: Migrate /mod command to Helix API. (#4000)
 - Minor: Migrate /unmod command to Helix API. (#4001)
+- Minor: Migrate /announce command to Helix API. (#4003)
 - Bugfix: Fix crash that can occur when closing and quickly reopening a split, then running a command. (#3852)
 - Bugfix: Connection to Twitch PubSub now recovers more reliably. (#3643, #3716)
 - Bugfix: Fix crash that can occur when changing channels. (#3799)
diff --git a/src/controllers/commands/CommandController.cpp b/src/controllers/commands/CommandController.cpp
index 1b826cc08..b32becd80 100644
--- a/src/controllers/commands/CommandController.cpp
+++ b/src/controllers/commands/CommandController.cpp
@@ -1568,6 +1568,70 @@ void CommandController::initialize(Settings &, Paths &paths)
 
         return "";
     });
+
+    this->registerCommand(
+        "/announce", [](const QStringList &words, auto channel) -> QString {
+            auto *twitchChannel = dynamic_cast<TwitchChannel *>(channel.get());
+            if (twitchChannel == nullptr)
+            {
+                channel->addMessage(makeSystemMessage(
+                    "This command can only be used in Twitch channels."));
+                return "";
+            }
+
+            if (words.size() < 2)
+            {
+                channel->addMessage(makeSystemMessage(
+                    "Usage: /announce <message> - Call attention to your "
+                    "message with a highlight."));
+                return "";
+            }
+
+            auto user = getApp()->accounts->twitch.getCurrent();
+            if (user->isAnon())
+            {
+                channel->addMessage(makeSystemMessage(
+                    "You must be logged in to use the /announce command"));
+                return "";
+            }
+
+            getHelix()->sendChatAnnouncement(
+                twitchChannel->roomId(), user->getUserId(),
+                words.mid(1).join(" "), HelixAnnouncementColor::Primary,
+                []() {
+                    // do nothing.
+                },
+                [channel](auto error, auto message) {
+                    using Error = HelixSendChatAnnouncementError;
+                    QString errorMessage =
+                        QString("Failed to send announcement - ");
+
+                    switch (error)
+                    {
+                        case Error::UserMissingScope: {
+                            // TODO(pajlada): Phrase MISSING_REQUIRED_SCOPE
+                            errorMessage +=
+                                "Missing required scope. Re-login with your "
+                                "account and try again.";
+                        }
+                        break;
+
+                        case Error::Forwarded: {
+                            errorMessage += message;
+                        }
+                        break;
+
+                        case Error::Unknown:
+                        default: {
+                            errorMessage += "An unknown error has occurred.";
+                        }
+                        break;
+                    }
+
+                    channel->addMessage(makeSystemMessage(errorMessage));
+                });
+            return "";
+        });
 }
 
 void CommandController::save()
diff --git a/src/providers/twitch/api/Helix.cpp b/src/providers/twitch/api/Helix.cpp
index 4414c11d1..d151da322 100644
--- a/src/providers/twitch/api/Helix.cpp
+++ b/src/providers/twitch/api/Helix.cpp
@@ -4,6 +4,7 @@
 #include "common/QLogging.hpp"
 
 #include <QJsonDocument>
+#include <magic_enum.hpp>
 
 namespace chatterino {
 
@@ -1098,6 +1099,85 @@ void Helix::removeChannelModerator(
         .execute();
 }
 
+void Helix::sendChatAnnouncement(
+    QString broadcasterID, QString moderatorID, QString message,
+    HelixAnnouncementColor color, ResultCallback<> successCallback,
+    FailureCallback<HelixSendChatAnnouncementError, QString> failureCallback)
+{
+    using Error = HelixSendChatAnnouncementError;
+
+    QUrlQuery urlQuery;
+
+    urlQuery.addQueryItem("broadcaster_id", broadcasterID);
+    urlQuery.addQueryItem("moderator_id", moderatorID);
+
+    QJsonObject body;
+    body.insert("message", message);
+    const auto colorStr =
+        std::string{magic_enum::enum_name<HelixAnnouncementColor>(color)};
+    body.insert("color", QString::fromStdString(colorStr).toLower());
+
+    this->makeRequest("chat/announcements", urlQuery)
+        .type(NetworkRequestType::Post)
+        .header("Content-Type", "application/json")
+        .payload(QJsonDocument(body).toJson(QJsonDocument::Compact))
+        .onSuccess([successCallback, failureCallback](auto result) -> Outcome {
+            if (result.status() != 204)
+            {
+                qCWarning(chatterinoTwitch)
+                    << "Success result for sending an announcement was"
+                    << result.status() << "but we only expected it to be 204";
+            }
+
+            successCallback();
+            return Success;
+        })
+        .onError([failureCallback](auto result) {
+            auto obj = result.parseJson();
+            auto message = obj.value("message").toString();
+
+            switch (result.status())
+            {
+                case 400: {
+                    // These errors are generally well formatted, so we just forward them.
+                    // This is currently undocumented behaviour, see: https://github.com/twitchdev/issues/issues/660
+                    failureCallback(Error::Forwarded, message);
+                }
+                break;
+
+                case 403: {
+                    // 403 endpoint means the user does not have permission to perform this action in that channel
+                    // `message` value is well-formed so no need for a specific error type
+                    failureCallback(Error::Forwarded, message);
+                }
+                break;
+
+                case 401: {
+                    if (message.startsWith("Missing scope",
+                                           Qt::CaseInsensitive))
+                    {
+                        // Handle this error specifically because its API error is especially unfriendly
+                        failureCallback(Error::UserMissingScope, message);
+                    }
+                    else
+                    {
+                        failureCallback(Error::Forwarded, message);
+                    }
+                }
+                break;
+
+                default: {
+                    qCDebug(chatterinoTwitch)
+                        << "Unhandled error sending an announcement:"
+                        << result.status() << result.getData() << obj;
+                    failureCallback(Error::Unknown, message);
+                }
+                break;
+            }
+        })
+        .execute();
+}
+
 NetworkRequest Helix::makeRequest(QString url, QUrlQuery urlQuery)
 {
     assert(!url.startsWith("/"));
diff --git a/src/providers/twitch/api/Helix.hpp b/src/providers/twitch/api/Helix.hpp
index f18669c03..c3e099506 100644
--- a/src/providers/twitch/api/Helix.hpp
+++ b/src/providers/twitch/api/Helix.hpp
@@ -300,6 +300,16 @@ struct HelixChannelEmote {
     }
 };
 
+enum class HelixAnnouncementColor {
+    Blue,
+    Green,
+    Orange,
+    Purple,
+
+    // this is the executor's chat color
+    Primary,
+};
+
 enum class HelixClipError {
     Unknown,
     ClipsDisabled,
@@ -340,6 +350,14 @@ enum class HelixDeleteChatMessagesError {
     Forwarded,
 };
 
+enum class HelixSendChatAnnouncementError {
+    Unknown,
+    UserMissingScope,
+
+    // The error message is forwarded directly from the Twitch API
+    Forwarded,
+};
+
 enum class HelixAddChannelModeratorError {
     Unknown,
     UserMissingScope,
@@ -511,6 +529,13 @@ public:
         FailureCallback<HelixRemoveChannelModeratorError, QString>
             failureCallback) = 0;
 
+    // https://dev.twitch.tv/docs/api/reference#send-chat-announcement
+    virtual void sendChatAnnouncement(
+        QString broadcasterID, QString moderatorID, QString message,
+        HelixAnnouncementColor color, ResultCallback<> successCallback,
+        FailureCallback<HelixSendChatAnnouncementError, QString>
+            failureCallback) = 0;
+
     virtual void update(QString clientId, QString oauthToken) = 0;
 };
 
@@ -652,6 +677,13 @@ public:
         FailureCallback<HelixRemoveChannelModeratorError, QString>
             failureCallback) final;
 
+    // https://dev.twitch.tv/docs/api/reference#send-chat-announcement
+    void sendChatAnnouncement(
+        QString broadcasterID, QString moderatorID, QString message,
+        HelixAnnouncementColor color, ResultCallback<> successCallback,
+        FailureCallback<HelixSendChatAnnouncementError, QString>
+            failureCallback) final;
+
     void update(QString clientId, QString oauthToken) final;
 
     static void initialize();
diff --git a/tests/src/HighlightController.cpp b/tests/src/HighlightController.cpp
index 7b6bbab66..59219c03b 100644
--- a/tests/src/HighlightController.cpp
+++ b/tests/src/HighlightController.cpp
@@ -241,6 +241,14 @@ public:
                       failureCallback)),
                 (override));
 
+    // The extra parenthesis around the failure callback is because its type contains a comma
+    MOCK_METHOD(void, sendChatAnnouncement,
+                (QString broadcasterID, QString moderatorID, QString message,
+                 HelixAnnouncementColor color, ResultCallback<> successCallback,
+                 (FailureCallback<HelixSendChatAnnouncementError, QString>
+                      failureCallback)),
+                (override));
+
     MOCK_METHOD(void, update, (QString clientId, QString oauthToken),
                 (override));
 };